Answer:
The temperature in 5 hours will be -25°C.
The temperature 8 hours ago was 14°C.
Step-by-step explanation:
To find the temperature, y, in degrees Celsius at any given number of hours, x, from the current time, we can create a linear equation in the form y = mx + b, where m is the rate of change and b is the current temperature.
Given the current temperature is -10°C, then b = -10.
Given the temperature falls at a constant rate of 3°C per hour, then m = -3.
Substitute the values of m and b into the formula:
[tex]\boxed{y = -3x - 10}[/tex]
where:
y is the temperature in °C.x is the number of hours.To calculate the temperature in 5 hours time, substitute x = 5 into the equation:
[tex]\begin{aligned}\implies y&=-3(5)-10\\&=-15-10\\&=-25^{\circ}\text{C}\end{aligned}[/tex]
Therefore, the temperature in 5 hours will be -25°C.
To calculate the temperature 8 hours ago, substitute x = -8 into the equation. The value of x is negative since we want to find the temperature 8 hours before the current time.
[tex]\begin{aligned}\implies y&=-3(-8)-10\\&=24-10\\&=14^{\circ}\text{C}\end{aligned}[/tex]
Therefore, the temperature 8 hours ago was 14°C.
What kind of relationship does this table describe?
The table describes the relationship between membership status and attendance of classes under the principle of independence.
Option A is the correct answer.
We have,
This table describes the relationship between membership status and attendance of classes.
To determine if there is a relationship, we need to apply the principle of independence.
If the principle of independence holds, then the events "having a membership" and "attending one or more classes" are independent of each other, and similarly, the events "not having a membership" and "attending none of the classes" are independent of each other.
To check for independence, we can calculate the expected values for each cell assuming independence holds, and compare them to the observed values.
The expected value for "Have a membership" and "Attend one or more classes".
= (40/70) x (31/70) x 70
= 17.86
The expected value for "Have a membership" and "Attend none of the classes".
= (40/70) x (39/70) x 70
= 22.14
The expected value for "Do not have a membership" and "Attend one or more classes".
= (30/70) x (31/70) x 70
= 13.14
The expected value for "Do not have a membership" and "Attend none of the classes".
= (30/70) x (39/70) x 70
= 16.86
Comparing these expected values with the observed values, we see that they are reasonably close, indicating that the principle of independence holds.
Therefore,
We can conclude that this table describes the relationship between membership status and attendance of classes under the principle of independence.
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PLEASE HELP QUICKLY!!(20 points)
put the items in order from least steep to steepest rate of change
Elisas puppy weighed 4 pounds when it was born it gained 5 pounds per month until it was 9 months old.
g(x) = 8.1x + 45.64
Michele has $125 she plans to spend $10 per week until she has a total of $75
f(t) = -6.2x + 2.9
Answer:
The items arranged from least steep to steepest rate of change are:
Michele's spending: $125 to $75 over time, spending $10 per week.
Elisa's puppy's weight: Started at 4 pounds, gained 5 pounds per month until it was 9 months old.
f(t): -6.2x + 2.9, a linear function with a rate of change of -6.2.
g(x): 8.1x + 45.64, a linear function with a rate of change of 8.1.
So the correct order is:
Michele's spending
Elisa's puppy's weight
f(t)
g(x)
Step-by-step explanation:
Please help me with this question! I don't understand!
Which of the following step functions corresponds to the graph shown?
Answer:
f(x) =
0 if -1 < x < 0,
1 if 0 < x < 3,
2 otherwise
At a certain restaurant, the hourly wage for a waiter is 20 percent greater than the hourly wage for a dishwasher, and the hourly wage for a dishwasher is half as much as the hourly wage for a cook's assistant. If a cook's assistant earns $13.00 an hour, how much less than a cook's assistant does a waiter earn each hour?
At a certain restaurant, the hourly wage for a waiter is 20 percent greater than the hourly wage for a dishwasher, and the hourly wage for a dishwasher is half as much as the hourly wage for a cook's assistant. If a cook's assistant earns $13.00 an hour.
Let's break down the problem and use algebra to solve it step by step
1. Let x be the hourly wage for a dishwasher.
2. We know that the hourly wage for a waiter is 20% greater than the hourly wage for a dishwasher, so the hourly wage for a waiter is
x + 0.2x = 1.2x
3. We also know that the hourly wage for a dishwasher is half as much as the hourly wage for a cook's assistant, so
x = 1/2 * $13.00
x = $6.50
Therefore, the hourly wage for a dishwasher is $6.50.
4. We can substitute x = $6.50 into the expression we found for the hourly wage of a waiter
1.2x = 1.2 * $6.50
1.2x = $7.80
Therefore, the hourly wage for a waiter is $7.80.
5. Finally, we can calculate the difference in hourly wage between a cook's assistant and a waiter
Hourly wage difference = hourly wage for cook's assistant - hourly wage for waiter
Hourly wage difference = $13.00 - $7.80
Hourly wage difference = $5.20
Therefore, a waiter earns $5.20 less than a cook's assistant each hour.
In summary, we can use algebra to find that a dishwasher earns $6.50 an hour, a waiter earns $7.80 an hour, and a waiter earns $5.20 less than a cook's assistant each hour.
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Lindsay sketches a right triangle with lengths f, g, and h as shown. She uses the Pythagorean Theorem to write the equation f2 + g2 = h2 to represent the triangle. How can Lindsay correct her error? Explain your reasoning.
It is a right triangle so f² = g² + h² not f² + g² = h²
What is the Pythagoras theorem?
A right triangle's three sides are related in Euclidean geometry by the Pythagorean theorem, also known as Pythagoras' theorem. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.
Here, we have
Given: Lindsay sketches a right triangle with lengths f, g, and h has shown. She uses the Pythagorean Theorem to write the equation f² + g² = h² to represent the triangle.
It is a right triangle.
∴ f² = g² + h² not f² + g² = h²
Hence, It is a right triangle. f² = g² + h² not f² + g² = h²
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A football field is 300 feet long and 160 feet wide. To the nearest hundredth, how many acres are in a football field?
x = how many acres
keeping in mind that one yd² has 9 ft², and that an acre has 4840 yd²
[tex](300ft)(160ft)\implies 48000ft^2\implies \cfrac{48000}{9}\implies \cfrac{16000}{3}~yd^2 \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{ccll} acre&yd^2\\ \cline{1-2} 1 & 4840\\[1em] x&\frac{16000}{3} \end{array} \implies \cfrac{1}{x}~~=~~\cfrac{4840}{ ~~ \frac{16000}{3} ~~ }\implies \cfrac{1}{x}=\cfrac{14520}{16000} \\\\\\ 16000=14520x\implies \cfrac{16000}{14520}=x\implies 1.10\approx x[/tex]
If cosθ = 0.2, find the value of
cosθ + cos (θ + 2π) + cos (θ + 4π)
Hence, the value of CosФ + Cos (2π+Ф) + Cos (4π+Ф) is 0.6 .
What is Cosine function ?The cosine function One of the fundamental trigonometry functions is cos x as the others being the co-secant, cotangent, secant, sine, and tangent. Let theta represent the angle that can be calculated by rotating the unit circle's arc anticlockwise from the x-axis. Cos theta is the arc endpoint of horizontal coordinate after that.
What is the trigonometry identities?trigonometric functions are used in an expression or equation, trigonometric Identities are helpful. For every value of a variable appearing on both sides of an equation, a trigonometric identity is true. Certain trigonometric functions such as sine, cosine, and tangent of one or more angles are involved geometrically in these identities.Three main are trigonometry functions are sine, cosine, and tangent, while the other three are cotangent, secant, and co-secant. All six trigonometric functions serve as the foundation for the trigonometric identities.
Given, CosФ = 0.2,
thus we can use the trigonometric identity:
cos(2 n π+Ф) = cosФ
where any integer n is used. Therefore:
Cos(2 π+ Ф) = CosФ
cos (4π+Ф) = cosФ
These values, put into the given expression
than we get,
cos Ф+ cos (2π+Ф) + cos (4π+Ф) = cos Ф+ cosФ + cosФ.
= 3 cosФ
= 3×0.2
= 0.6
So,CosФ + Cos (2π+Ф) + Cos (4π+Ф) = 0.6
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What is the distance between the points located at (−7, −18) and (−7, 25)?
7 units
43 units
−43 units
−7 units
Answer:
43
Step-by-step explanation:
The distance formula is
[tex] \sqrt{{(x2 - x1)}^{2} + (y2 - y1)^{2} } [/tex]
So
[tex] \sqrt{(25 + 18) ^{2} + ( - 7 + 7)^{2} } \\ = \sqrt{ {43}^{2} + 0 {}^{2} } = 43[/tex]
Answer:
43 unitsStep-by-step explanation:
The distance between the two given points can be found using the formula for the distance between two points in a coordinate plane,
which is d = √((x₂ - x₁)² + (y₂ - y₁)²). In this case, the x-coordinates of both points are the same (-7), so we only need to calculate the difference between their y-coordinates: d = √((0)² + (25 - (-18))²) = √(43²) = 43 units. Therefore, the distance between the two points located at (-7, -18) and (-7, 25) is 43 units
Write the equation of the line that passes through the points (5,4) and (5,-8). Put your answer in fully simplified point-slope form, unless it is a vertical or horizontal line.
Answer: x=5
Step-by-step explanation:
Not much calculations needed, but since we have two points where x=5, a vertical line that is equal to x=5 will hit both points. I attached it visually below!
The amount of snowfall in December was 5 7/8 feet. The amount of snowball in October was 1/4 feet. How much more snowfall was there in December? Write your answer as a mixed number in simplest form.
Answer: 5 5/8 more feet of snow in December.
Step-by-step explanation: 5 7/8 also equals 47/8, and we need convert 1/4 to something over 8 so we can subtract the two. 1/4, but multiply both sides by 2 is 2/8. 47/8-2/8=45/8. 45/8 as a mixed fraction is 5 5/8.
From experience, an airline knows that only of the passengers booked on a flight from New York to Los Angeles actually board their flight. A random sample of booked passengers from New York to Los Angeles is chosen. Find the probability that of them board their flight.
Do not round your intermediate computations, and round your answer to three decimal places.
Step-by-step explanation:
6 or 7.
that means either exactly 6 or exactly 7 out of the 10 board the flight.
these are non-depending (or non-overlapping) scenarios. so, for this "or" remained we can simply add the 2 individual probabilities P(6) and P(7).
P(6) is the probability of exactly 6 passengers out of 10 will board the flight.
because of the 75% certainty overall we can conclude that the probabilty for each booked passenger to board is 0.75 (75% means 75 out of 100 = 0.75).
and the probabilty to not board is
1 - 0.75 = 0.25
so, for a specific group of exactly 6 booked passengers out of 10 their probabilty to board is
0.75⁶ × 0.25⁴ = 0.000695229...
6 passengers board, 4 do not board.
but this is for only one possible grouping of 6 passengers out of 10.
since the sequence does not matter, and we have no repetitions (every passenger counts as 1), we have combinations :
C(10, 6) = 10! / (6! × (10-6)!) = 10!/(6!×4!) = 10×9×8×7/4! =
= 5×3×2×7 = 210
therefore,
P(6) = 210 × 0.75⁶ × 0.25⁴ = 0.145998001...
and for a specific group of exactly 7 booked passengers out of 10 their probabilty to board is
0.75⁷ × 0.25³ = 0.002085686...
7 passengers board, 3 do not board.
but this is for only one possible grouping of 7 passengers out of 10.
since the sequence does not matter, and we have no repetitions (every passenger counts as 1), we have combinations :
C(10, 7) = 10! / (7! × (10-7)!) = 10!/(7!×3!) = 10×9×8/3! =
= 5×3×8 = 120
therefore,
P(7) = 120 × 0.75⁷ × 0.25³ = 0.250282288...
so, the probability that either 6 or 7 booked passengers are actually boarding is
P(6) + P(7) = 0.396280289... ≈ 0.396
HELP ASAPPPP!!!! Can someone help me write a recursive equation for this table and please explain it if possible
The recursive equation for this table is given as follows:
f(n) = 3f(n - 1) + 1.
How to define the recursive equation?To obtain the recursive equation, we must obtain a pattern between a term and the previous term.
For this problem, we have that each term is the previous term multiplied by 3 and added by one.
Hence the recursive equation for this table is given as follows:
f(n) = 3f(n - 1) + 1.
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If coto = 13 on top
6 on bottom
Then what is Seco
Remember to simplify and rationalize all answer
Answer:
√(205)/13
Step-by-step explanation:
what is the parallel line that passes through the point (-6, -3) for the line y= -5/3 x - 3
Answer:
y = -5/3 x - 13
Step-by-step explanation:
Parallel lines have the same slope. The slope will be -5/3
y = mx + b
We will substitute -3 for y (-6,-3).
We will substitute -5/3 for m.
We will substitute -6 for x (-6,-3)
-3 = -5/3(-6) + b
-3 = [tex]\frac{30}{3}[/tex] + b
-3 = 10 + b Subtract 10 from both sides
-3 - 10 = 10 - 10 + b
-13 = b
To write the equation, use -5/3 for m (the slope) and -13 for b (the y-intercept)
y = mx + b
y = -5/3 x - 13
Helping in the name of Jesus.
Joann's grandparents set up an investment account for her when she was born. They put $3000 in it when she was born and then add $300 to it twice a year. The money is invested in mostly bonds and earns an average of 4% each year. Her interest compounds semiannually. How much will she have when she turns 18?
When Joann turns 18, she will have approximately $41,551.20 in her investment account.
How to solve for the future valueFV = P * [(1 + r)^n - 1] / r
FV = future value
P = periodic payment ($300)
r = interest rate per period (0.04 / 2 = 0.02)
n = total number of periods (18 years * 2 = 36)
FV = 300 * [(1 + 0.02)^36 - 1] / 0.02
FV ≈ 300 * [2.3084] / 0.02
FV ≈ 34,626.00
Solve for inotial investment
FV_initial = PV * (1 + r)^n
FV_initial = 3000 * (1 + 0.02)^36
FV_initial ≈ 3000 * 2.3084
FV_initial ≈ 6,925.20
we have to add both future values
Total_FV = 6,925.20 + 34,626.00
Total_FV ≈ 41,551.20
When Joann turns 18, she will have approximately $41,551.20 in her investment account.
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Diane Warner can rent a minivan for $24.95 per day plus $0.15 per mile, or she can rent a
large van for $289 per week with no additional charge for mileage. If she plans on renting the
car for 7 days and driving a total of 1,200 miles, which vehicle is a better buy?
In this case, renting the huge van would be a more cost-effective option because it would run you $289 as opposed to $354.65 for the minivan.
To compare the costs of renting the minivan and the large van, we need to calculate the total cost for each option.
For the minivan, the cost per day is $24.95 and the cost per mile is $0.15. So, for 7 days and 1,200 miles, the total cost would be:
Total cost = 7($24.95) + 1,200($0.15)
= $354.65
For the large van, the cost is a flat rate of $289 per week with no additional charge for mileage. So, for 7 days and 1,200 miles, the total cost would be:
Total cost = $289
Therefore, renting the large van would be a better buy in this scenario, as it would cost $289 compared to $354.65 for the minivan.
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#9
Identify an example of a solid from which a triangular, hexagonal, and trapezoidal cross section can be formed.
O cone
O sphere
O cylinder
O triangular prism
hexagonal prism
HELP DOING CORRECTIONS DUE IN A HOUR GIVING BRAINLIEST AND 25 POINS
Answer:
s = 10√3
Step-by-step explanation:
This is a 30°-60°-90° right triangle, so s, the length of the longer leg, is √3 times the length of the shorter leg. Since the length of the shorter leg is 10, s = 10√3.
Why is
C(A) generally not same as C(U)
where U is an echelon form obtained by reducing A?
Thank you in advance.
The discrepancy between the column spaces of a matrix's echelon form U and its original form A, C(U) and C(A) respectively, originates from how column space is defined.
How to explain the differenceColumn space is purported as the set of all linear combinations of the columns in the matrix. Nonetheless, despite elementary row operations modifying the linear independence of the matrix, it does not alter its column space.
Subsequently, therby resulting to C(U) being a subspace of C(A). This concept can be exemplified via an example: When we employ 3x3 matrix with linearly independent columns, then its echelon form U may only display two linearly independent columns; thus increasingly shrinking the dimension of the transformed matrix's column space.
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Richard bought 3 slices of pizza and 2 sodas for 8.75. Jordan bought 2p and 4s for 8.50. How much would 1p and 3s cost?
I need help; please include an explanation!
We can see here that the equation that best models the situation is: B. 13 - (60h/23) = 10.
What is speed?Speed is a scalar quantity that describes how fast an object is moving, or the rate at which it covers distance. It is typically measured in units of distance per unit of time, such as miles per hour or meters per second.
Speed only tells us how fast an object is moving, without any information about the direction of motion or changes in direction.
We can see that if we find the time, h in hours, we will have:
h = (3 x 23)/60
Simplifying this expression gives us:
h = 69/60
Therefore, the equation is:
h = 1.15
(Note: 3 is gotten from 13 gallons - 10 gallons = 3 gallons that was used at that particular time and speed).
If we substitute h = 1.15 into our model equation, we will get the correct answer.
Thus, 13 - (60 × 1.15)/23 = 10.
∴ Option B is the correct answer.
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P = $3000, r = 7%, t = 1 year
Calculate the simple interest earned. Round to the nearest cent.
Answer:
The interest earned in $210.00
Step-by-step explanation:
i = prt
i = 3000(.07)(1)
i = 210.00
Helping in the name of Jesus.
1. What does the term inflation mean? If meat prices go up, does this auto-
matically mean that there is inflation? Explain your answer.
2. Give an example of who is hurt and who is helped by inflation. Briefly
explain how inflation affects each group you have named.
3. How is the Consumer Price Index used to measure the rate of inflation?
Inflation refers to the general increase in prices of goods and services in an economy over a period of time.
A rise in meat prices may be an indication of inflation, but it is not necessarily an automatic or definitive sign of inflation.
Inflation can hurt savers and fixed-income earners, such as retirees on a fixed pension, as the purchasing power of their savings and income decreases.
The Consumer Price Index (CPI) is used to measure the rate of inflation by tracking the average price change of a basket of goods and services commonly purchased by households, including food, housing, transportation, and medical care.
The CPI measures the percentage change in prices from a base period and is calculated by dividing the cost of the basket of goods and services in the current period by the cost of the same basket in the base period and multiplying the result by 100.
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Milan took 3 1/4 hours to clean the bathroom. He took 1/8 hours to clean the bathroom. How much longer did it take Milan to clean the bathroom? Write your answer as a mixed number in simplest form.
The time it took Milan longer to clean the bathroom is 3 1/8 hours
How much longer did it take Milan to clean the bathroom?Time taken for Milan to clean the bathroom = 3 1/4 hours
Time taken for Milan to clean the kitchen = 1/8 hours
Time taken longer for Milan to clean the bathroom = 3 1/4 hours - 1/8 hours
= 13/4 - 1/8
= (26-1) / 8
= 25/8
= 3 1/8 hours
In conclusion, it took Milan 3 1/8 hours longer to clean the bathroom.
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Can someone help me with this problem?
The measure of the arc angle is as follows:
m∠BAC = 228°
How to find arc angles?The central angle of an arc is the central angle subtended by the arc.
The measure of an arc is the measure of its central angle.
The Central Angle theorem states that the central angle subtended by
two points on a circle is twice the inscribed angle subtended by those
points.
Therefore, let's find m∠BAC
Hence,
m∠BC = Central angle
m∠BAC = 360 - 132
m∠BAC = 228 degrees
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What is the meaning of [tex]r_{i-j}[/tex]?
This expression [tex]r_{i-j}[/tex] describes the distance between two points i and j in a geometric object
Explaining the meaning of the expressionIn the context of symmetry and rotations, [tex]r_{i-j}[/tex] typically refers to the distance between two points i and j in a geometric object, such as a crystal lattice or a molecule.
It is a vector that points from point i to point j, and its magnitude is the distance between the two points.
The distance vector [tex]r_{i-j}[/tex] is also used to describe the position of a point in the crystal lattice relative to the rotation axis.
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HELPPPPP PLEASE QUICK
check the pic please
Answer:
radius = 72.00 units
Step-by-step explanation:
The general formula for circumference (C) of a circle is C = πd, where d is the diameter. The formula using 3.14 for π is C = 3.14d The diameter (d) is simply twice the radius (r) as d = 2r
Thus, we can rewrite the formula for circumference in terms of radius as C = 3.14(2r)
To solve for r, we can divide the circumference we're given by the product of 3.14 and 2 to find r:
[tex]C/(2*3.14)=r\\452.16(2*3.14)=r\\452.16/6.28=r\\72=r[/tex]
Angles in a Triangle
Answer:
70
Step-by-step explanation:
The non-labeled side (next to 130) has to be supplementary to the angle outside, hence it has to be 50. Since all the sides of an angle must add up to 180, we can subtract 60+50 to get 70. Hope this helps!
Answer:
70°
Step-by-step explanation:
Theorem:
The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles.
130 = x + 60
x = 70
Answer: 70°
For a confidence level of 80%, find the critical value. Round to 3 decimal places.
Answer:
Step-by-step explanation:
80.000
Purchase 400 motors per month what is percent saved if you order 800 every 2 months round to nearest tenth